| GemCad Ray Traces for RI = 1.54 | ||
 |
||
| Random Model | Cosine Model | ISO Model |
| Four Hummers I
designed by Bob Keller 11.18.01 |
|
| Angles for R.I. = 1.54 and Up | 73 facets + 8 facets on girdle = 81 |
| 4-fold, mirror-image symmetry | 96 index |
| L/W = 1.000 T/W = 0.195 T/L = 0.195 P/W = 0.563 C/W = 0.227 | H/W = (P+C)/W+0.02 = 0.810 P/H = 0.695 C/H = 0.281 |
| Vol./W^3 = 0.364 | Brightness at 0 degrees tilt for RI = 1.54
COS = 87.8 ISO = 91.7 |
| Pavilion | |||
|---|---|---|---|
| 1 | 42.00 | 96-04-08-12-16-20-24-28-32-36-40-44-48 52-56-60-64-68-72-76-80-84-88-92 | Cut to center point |
| g1 | 90.00 | 12-36-60-84 | Set size |
| g2 | 90.00 | 96-24-48-72 | Meet 1.1.g1 |
| 2 | 75.00 | 96-24-48-72 | Meet 1.g1.g2 |
| Crown | |||
| a | 78.00 | 96-24-48-72 | Level upper girdle line, match g2 |
| b | 36.14 | 12-36-60-84 | Meet g1.g2.a |
| c | 32.71 | 06-18-30-42-54-66-78-90 | Meet g1.g2.a.b |
| d | 24.67 | 06-18-30-42-54-66-78-90 | Meet a.c.c |
| e | 18.66 | 03-21-27-45-51-69-75-93 | Meet a.c.d |
| f | 17.45 | 96-24-48-72 | Meet a.c.d.e |
| g | 20.90 | 12-36-60-84 | Meet b.c.d |
| h | 16.26 | 12-36-60-84 | Meet e.f.f.e |
| t | 0.00 | Table | Meet e.f.h |
A Four Hummers I GemCad Design File is available for GemCad users.
